JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A ›› 2010, Vol. 23 ›› Issue (3): 113-116.

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Leniency Bias and Statistical Remedy in Evaluation of Teaching

WU Rui-lin1, ZHANG Yan-tong2, WANG Jian-zhong1   

  1. 1. Institute of Psychology and Behavior, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;;
    2. Institute of Higher Education, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2009-02-24 Online:2010-05-25 Published:2010-06-29

Abstract:

Leniency bias has a detrimental effect to analysis of indicators- relationships in teaching evaluation. It will distort the statistic results based on the Pear son correlation coefficient. The current paper employed polychoric correlation c oefficient to analyze teaching evaluation data, which has been proved robust and will offer more precise estimate. A non-normal real data sample shows that the re is sufficient difference between estimates of two correlation coefficient est imators. The approach based on polychoric correlation offered better fit indexes to a confirmatory factor analysis.

Key words: evaluation of teaching, leniency bias, polychoric correlation coefficient, Pears on correlation coefficient

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